import { createSlug } from '@/core/utils/slug';
import toTitleCase from '@/core/utils/toTitleCase';
import variantSearchApi from '@/lib/product/api/variantSearchApi';
import axios from 'axios';
import _ from 'lodash-contrib';
import { create } from 'xmlbuilder';

export async function getServerSideProps({ res, query }) {
  const titleContent = 'Indoteknik.com: B2B Industrial Supply & Solution';
  const descriptionContent =
    'Temukan pilihan produk B2B Industri & Alat Teknik untuk Perusahaan, UMKM & Pemerintah dengan lengkap, mudah dan transparan.';

  const { page } = query;
  const limit = 5000;
  const queries = {
    limit,
    page: page.replace('.xml', ''),
    priceFrom: 1,
    orderBy: 'popular',
    fq: 'image_s:["" TO *]',
  };
  const products = await variantSearchApi({ query: _.toQuery(queries) });

  const brandsData = {};
  const categoriesData = {};

  const productItems = [];
  for (const product of products.response.products) {
    const productUrl = createSlug(
      '/shop/product/variant/',
      product.name,
      product.id,
      true
    );
    const productId = product.code != '' ? product.code : product.id;
    const regexHtmlTags = /(<([^>]+)>)/gi;
    product.description = product.description
      ?.replace(regexHtmlTags, ' ')
      .trim();
    const defaultProductDescription =
      'Indoteknik.com menawarkan berbagai produk industri, konstruksi, dan teknik terpercaya. Temukan mesin industri, peralatan listrik, alat pengukur, dan banyak lagi. Pengalaman berbelanja mudah dengan deskripsi produk lengkap, spesifikasi teknis, dan gambar jelas. Pembayaran aman, pengiriman cepat ke seluruh Indonesia. Solusi lengkap untuk kebutuhan Kantor, Industri & Teknik Anda.';

    if (!product.description) {
      product.description = defaultProductDescription;
    }

    let categoryName = null;

    let brandId = product.manufacture?.id ?? null;
    let categoryId = null;

    if (brandId && brandId in brandsData) {
      categoryId = brandsData[brandId].category_ids?.[0] ?? null;
    } else {
      const solrBrand = await getBrandById(brandId);
      brandsData[brandId] = solrBrand;
      categoryId = solrBrand?.category_ids?.[0] ?? null;
    }

    if (categoryId && categoryId in categoriesData) {
      categoryName = categoriesData[categoryId].name_s ?? null;
    } else {
      const solrCategory = await getCategoryById(categoryId);
      categoriesData[categoryId] = solrCategory;
      categoryName = solrCategory?.name_s ?? null;
    }

    const availability = 'in_stock';

    const item = {
      'g:id': { '#text': productId },
      'g:title': { '#text': toTitleCase(product.name) },
      'g:description': { '#text': product.description },
      'g:link': { '#text': productUrl },
      'g:image_link': { '#text': product.image + '?variant=True' },
      'g:condition': { '#text': 'new' },
      'g:availability': { '#text': availability },
      'g:brand': { '#text': product.manufacture?.name || '' },
      'g:price': {
        '#text': `${Math.round(product.lowestPrice.price * 1.11)} IDR`,
      },
    };

    if (product.stockTotal == 0) {
      item['g:custom_label_0'] = { '#text': 'Stok Tidak Tersedia' };
    } else {
      item['g:custom_label_1'] = { '#text': 'Stok Tersedia' };
    }

    if (categoryName) {
      item['g:custom_label_2'] = { '#text': categoryName };
    }

    if (product.lowestPrice.discountPercentage > 0) {
      item['g:sale_price'] = {
        '#text': `${Math.round(product.lowestPrice.priceDiscount * 1.11)} IDR`,
      };
    }
    productItems.push(item);
  }

  const googleMerchant = {
    rss: {
      '@xmlns:g': 'http://base.google.com/ns/1.0',
      '@version': '2.0',
      channel: {
        title: { '#text': `<![CDATA[${titleContent}]]>` },
        link: { '#text': process.env.SELF_HOST },
        description: { '#text': `<![CDATA[${descriptionContent}]]>` },
        item: productItems,
      },
    },
  };

  res.setHeader('Content-Type', 'text/xml;charset=iso-8859-1');
  res.write(create(googleMerchant).end());
  res.end();

  return { props: {} };
}

const getBrandById = async (id) => {
  const brand = await axios(
    `${process.env.SOLR_HOST}/solr/brands/select?q=id:${id}`
  );
  return brand.data.response.docs[0] ?? null;
};

const getCategoryById = async (id) => {
  const category = await axios(
    `${process.env.SOLR_HOST}/solr/categories/select?q=id:${id}`
  );
  return category.data.response.docs[0] ?? null;
};

export default function GoogleMerchantPage() {
  return null;
}